#include <iostream>
#include <cstring>

int main()
{
    std::string str = "hello";
    std::cout<<str<<std::endl;
    //strlen
    std::cout << str.size()<<std::endl;
    //stycpy
    str = "world";
    std::cout<<str<<std::endl;
    //strcat
    str += "hello";
    std::cout<<str<<std::endl;

    std::string s1 = "hello";
    std::string s2 = "hello1";
    std::cout<< (s1 == s2)<<std::endl;

    return 0;
}